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UNITED STATES PATENT Orricn- JOSEPH E. BROMLEY, OF CHICAGO, ILLINOIS, AND ALEXANDER STRAUS, OF NEWV YORK, N. Y.; SAID BROMLEYASSIGNOR OF ONE-HALF TO ALFRED FEA'IIIERSTONE, OF CHICAGO, ILLINOIS.

TIRE FOR VEHlCLE- WH EELS.

SPECIFICATION forming part of Letters Patent No. 441,820, dated December 2, 1890. Application filed October 6 1890. Serial No. 367,144. (No model.)

To all whom it may concern.- strong fabric is suitable for the purpose- Be it known that we, JOSEPH E. BROMLEY such, for instance, as canvas. The cork filland ALEXANDER STRAUs, citizens of the ing may be composed of large sections cut United States, residing, the former at Chifrom cork-wood of suitable size and shape;or 5 cago, in the county of Cook and State of Illithe cork may be cut up finely, or in anyother nois, and the latter at New York,intl1e county way disintegrated, so that the filling will be of New York and State of New York, have incomposed of fine bits of cork. What is known vented certain new and useful Improvements as granulated cork is well adapted for the in Tires for Vehicle-Wheels, which are fully purpose. Vi e prefer a filling of comminuted IO set forth in the following specification, refercork, but do not confine our invention to this once being had to the accompanying drawparticular condition. The cork for the fill- 6o ings, in whiching may be steamed or not, as preferred. We Figure 1 represents a side elevation of the prefer to steam it, as it is then soft and pli core of atire embodying ourinvention,tl1einable, as well as elastic. In order to retain [5 closing covering being slightly broken away; this cork filling in place, so as to make a per- Fig. 2,a section of the same, taken'on theline manent core of proper form, it is inclosed 2 2 of Fig. 1; Fig. 3,aside elevation of awheel within some strong fabric a. Canvas is a with our improved tire applied thereto, the very suitable material. This outer covering felly and a portion of the tire being slightly is first formed in the shape of a long canvas 20 broken away at one point; and Fig. 4, a crosstube or tubular bag of the required length.

section of our improved tire on a much en- This tube or bag is then filled with the cork 7o larged scale. previously prepared, the cork being pressed Our invention relates to elastic tires for into the tube, so as to completely and solidly the wheels of vehicles, but more especially fill it. There is thus formed a long cylinder designed for the wheels of velocipedes and biof cork and canvas or other inclosing matecycles. rial. The ends of this cylinder are brought The object of ourinvention is to provide an together and fastened in any suitable way, elastic tire with a firm substantially solid thus forming a ring, as seen in Fig. 1 of the core and an exterior wrapping of rubber. drawings. This is the core for the tire, and The invention consists in a tire having a the latter is completed by placing this core in core of cork inclosed by a suitable retaining suitable molds and vulcanizing or molding So fabric and surrounded by an outer covering rubber around it, thus forming an exterior of rubber. covering B of rubber. The tire is then com- We will describe in detail the construction pleted and is applied to a wheel C in any orand mode of producing our improved tire, dinary way. Now, it will be seen that in this and Willthen point out definitely in the claim construction we obtain a tire the interior or the improvement which we believe to be new core of which is composed of an elastic maand desire to secure by Letters Patent. terial, but at the same time is tolerably firm In constructing tires after our invention a and solid. All the advantages of an elastic core is first made separate and entire. In the core are therefore obtained, and at the same drawings, A represents this core, which is in time additional advantages are secured by the shape of a ring of about the size desired the peculiar nature of the material employed. for the tire. The core shown in the drawings It is substantially firm and solid, so that it is cylindrical in cross-section; but this is not will not move under compression like a fluid absolutely essential, as other wellknown core. It is also harmless 1n its effect upon forms of wheel-tires may be employed. This the rubber covering. Metallic springs, as 5 core is composed of abody or filling aof cork, employed as cores, out the rubber and soon which is surrounded and retained in place by destroy it. The core is exceedingly durable. a covering a of any suitable material. Any It will not break down under long and severe usage, and at the same time it is so elastic as to provide a tire having all the desirable features of elastic tires. The rubber covering is also more lasting because of the firm support it receives from the core. The fabric completely surrounding and inclosing the corefilling protects the latter and also the rubber on the outside and keeps the cork interior in permanent form. There can be no material displacement of the core.

As already stated, we do not limit ourselves to any particular condition or preparation of the cork filling, or to any particular material for directly inclosing and retaining the cork filling, or to any special form of tire in cross section. Variations may be made in all these features.

and retained Within a covering of canvas or other suitable material, and an exterior of rubber molded or vulcanized about said core, substantially as and for the purposes specilied.

JOSEPH E. BROMLEY. ALEXANDER STRAUS.

Witnesses:

ROBERT J. CUMMINGS, R. P. OoRNWELL. 

